Originally Posted by
kevsf
Can I buy a 53cm, 54cm or 55cm frame? I read that I should aim for a 54cm but I'm buying second hand so I feel like I can't be picky.
The short answer is yes. Any of those should work. You could probably go to 52 or 56 and make it work. Depends on the frame geometry as well as your own.
But 54 +/- 1 is no problem and can almost always be adapted with only simple tweaks.
Personally, I'd go for a bit too large over a bit too small. But I'm out of step with modern sizing and most people now feel the opposite.